We have a scrapyard nearby that has a lot of very large motors, but I think they might be from trains and there is an obvious size limit on those. The ones you describe seem bigger.
On Tue, Apr 30, 2013 at 4:49 PM, Dave <e...@dc9.tzo.com> wrote: > There are more large motors like that around than you might suspect. > > The local Omnisource scrap yard had a 6000 hp motor blow and they > replaced it with a bigger motor. I think 8000 hp. > They shred cars and whatever else they can fit into it. > > I went to an aluminum recycling place once that needed some help with > their controls and they had a 5000 hp motor driving their aluminum > shredder. The motor looked like a small building with a big shaft > hanging out the side. > Every once in a while the shredder would jam up and people would have to > climb into the machinery with pry bars to get the stuck pieces out.. no > thanks... That machine was crazy loud. They used front end > construction loaders to load the conveyor that > fed the shredder. The result was small mountains of shredded aluminum. > > There is a steel mill nearby that has some huge motors that drive the > roller shafts directly - no gearboxes. The motors are so big that they > have doors in the side of them with steps leading up to the doors so > people can go into the motors to service them. The doors are full > height..not short ones.. > > Those motors run off of Cycloconverter drives. Also crazy big. > http://en.wikipedia.org/wiki/Cycloconverter > > Dave > > > > On 4/30/2013 3:20 PM, Pete Matos wrote: > > John > > That is amazing to me man....i mean I have seen some monster > electric > > motors before but 3k HP is nutz ...... I know the motors they used on > the > > draw bridges in South Florida where I used to live were big DC I believe > > and they lifted some amazing loads via counterbalance and gearing. > Lots > > of industrial application for motors like this. I also find it > > interesting that there is so much resistance to electric vehicles in the > > world when so many of the largest and most powerful vehicles are moved > with > > electric power. It is an awesome force and must be interesting to work > in > > that field. Peace > > > > Pete > > > > > > > > On Tuesday, April 30, 2013, John Kasunich<jmkasun...@fastmail.fm> > wrote: > > > >> > >> On Tue, Apr 30, 2013, at 02:14 PM, Stephen Dubovsky wrote: > >> > >>> SCR dc drives? Is this the 70's? > >>> > >>> LOL. Im kidding. But only partially:) > >>> > >>> SMD > >>> > >> For anything more than a few HP, SCRs still rule the DC drive world. > >> > >> I guess the toy stuff, under 1HP, is all PWM based these days. > >> Small but not toys, say 1 to 5 HP, is probably a mix. But I bet there > >> aren't many PWM DC drives above 5HP. > >> > >> My perspective is skewed somewhat, since the company I work > >> for makes industrial DC drives, from about 20HP up. We don't > >> mess with the tiny stuff. We recently shipped a 3000HP DC > >> drive for use in a steel mill. > >> > >> > >> -- > >> John Kasunich > >> jmkasun...@fastmail.fm > >> > >> > >> > > > ------------------------------------------------------------------------------ > > > >> Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET > >> Get 100% visibility into your production application - at no cost. > >> Code-level diagnostics for performance bottlenecks with<2% overhead > >> Download for free and get started troubleshooting in minutes. > >> http://p.sf.net/sfu/appdyn_d2d_ap1 > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > >> > > > ------------------------------------------------------------------------------ > > Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET > > Get 100% visibility into your production application - at no cost. > > Code-level diagnostics for performance bottlenecks with<2% overhead > > Download for free and get started troubleshooting in minutes. > > http://p.sf.net/sfu/appdyn_d2d_ap1 > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > ------------------------------------------------------------------------------ > Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET > Get 100% visibility into your production application - at no cost. > Code-level diagnostics for performance bottlenecks with <2% overhead > Download for free and get started troubleshooting in minutes. > http://p.sf.net/sfu/appdyn_d2d_ap1 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. 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